How to reduce pg_dump backup time

Dear Team,

I am using PostgreSQL 9.1 on Redhat Linux on my Production environment. My
database size is 680 GB and it take 7 hour for completion the pg_dump
backup.

I want that my pg_dump backup should be fast and take less time.

In PostgresQL 9.3 there is “ -j *njobs” *option is available for fast
pg_dump backup.

There is any way, that I will use *“ **-j njobs”** option *in “PostgreSQL
9.1 “ so that my backup is completed in less time or any other way in
”PostgreSQL 9.1” to take the backup fast. Kindly suggest?

*[root]# lsb_release –a*

LSB Version:
:base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch

Distributor ID: RedHatEnterpriseServer

Description: Red Hat Enterprise Linux Server release 6.7 (Santiago)

Release: 6.7

Codename: Santiago

*[root(at)CPPMOMA_DB01 even]# psql*

Password:

psql.bin (9.1.2)

Type "help" for help.

postgres=# select version();

version

---------------------------------------------------------------------------------------------------------------

PostgreSQL 9.1.2 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.1.2
20080704 (Red Hat 4.1.2-46), 64-bit

(1 row)

postgres=#

*Regards,*
Sachin Srivastava